Email Agency, Klaviyo Freelancer, or In-House? The Answer by List Size and Revenue
The answer depends on two numbers: how many profiles are on your list and how much revenue email already brings in. We priced all three options from published sources on October 22, 2026 and worked the year-one cost at three brand sizes, so you can see where each one stops making sense.
Short answer
Under about 25,000 profiles, hire a Klaviyo freelancer or buy a one-time flow build: Upwork lists $300 to $800 for basic flows and $500 to $1,500 a month for campaigns. From roughly 25,000 to 100,000 profiles, an agency retainer of $1,200 to $5,000 a month (Netalico, Retention Drivers, published) costs less than a hire. An in-house email marketer costs about $96,400 to $112,500 a year loaded (BLS and Indeed pay, grossed up because wages are 70% of what an employer spends), which starts to fit past about $6M and wins clearly by $10M. Evolve Media Agency quotes email per scope.
Pick by List Size First, Then by Email Revenue
All three options do the same three jobs: build the flows (the automated emails such as welcome, abandoned cart and post-purchase), send campaigns (the scheduled sends to your list), and grow the list. What changes is who does the thinking, how much you manage, and the cost.
A useful rule: keep what you pay for email work under about 10% of the revenue email brings in. Below that line, the work can pay for itself. Above it, you are paying for activity rather than return. The rows below apply that rule to list size.
Under 5,000 engaged profiles
Do it yourself in Klaviyo with its templates and our flows guide. Any paid option is a large share of what the list can earn.
5,000 to about 25,000 profiles
A Klaviyo freelancer, or a one-time flow build from an agency (Excelohunt from $349 a flow, Netalico from $2,500 for four core flows). You manage the work.
About 25,000 to 100,000 profiles
An agency retainer. Published: Retention Drivers $1,500 to $3,500 a month, Netalico $1,200 to $5,000 for campaigns plus a one-time flow fee.
100,000+ profiles and $10M+ in revenue
An in-house email marketer becomes reasonable, usually backed by a freelancer or agency for design and overflow.
Agency, Freelancer, In-House: Price, Scope, Fit and Contract
Email agency
Klaviyo freelancer
In-house hire
Hidden cost of an agency: the notice period and month one
With 30 or 60 days' notice, leaving costs one or two more months of fees. Month one is mostly setup, so results usually start in month two or three. Hustler's own FAQ says most clients see growth by month three.
Hidden cost of a freelancer: your time
Someone has to write the brief, approve every send and check the numbers. If that is you, count the hours. A freelancer with no one checking the work tends to send on schedule and stop improving.
Hidden cost of a hire: the search and the ramp
Recruiting takes weeks to months, and a new hire needs time to learn your products and your list before they run it well. Salary starts on day one either way.
The cost that is the same under all three
Klaviyo's subscription, SMS credits, and any discount you give in emails. None of these change with who sends the email, so leave them out when you compare the three options and add them back when you set the budget.
Which Option Is the Better Pick, Situation by Situation
The flows do not exist yet
A freelancer or a one-time agency build wins. Flows are a project. Paying a retainer to build them means paying the same monthly fee after they are done.
You want campaigns sent every week and nobody on staff has time
An agency wins. A freelancer still needs someone to brief them, and a hire takes months to find and train.
Email and SMS are a top-three channel and you sell many products
In-house starts to fit past about $6M and wins clearly by $10M, because the hire is in every product meeting. Pair them with a freelancer for design.
You have a marketer who can manage the work
A freelancer wins. Your marketer sets the plan and the freelancer builds and sends, at a fraction of an agency fee.
You need someone to own deliverability, segments and reporting together
An agency or a senior hire wins. Most freelancers sell production, not the whole system.
You want a plan but cannot fund a retainer
A one-time audit wins. Published: Excelohunt $419 and Netalico $1,000. You get the list of fixes and decide who does them, including you.
You want Shopify list capture, the store and email planned together
That is where we fit: the same three people who build flows also run Shopify conversion work, quoted per scope. If you only want campaigns sent, Retention Drivers' published plans are the simpler buy.
Year-One Math at $1M, $4M and $10M a Year
These are worked examples. We assume email brings in 15% of revenue for the $1M brand and 20% for the other two. Prices are the published figures above, added over twelve months. Klaviyo's subscription (published pricing) is the same under every option, so it is listed once per brand.
The assumption that moves the answer most is email's share of revenue. Example only: if email brings in 10% for Brand B instead of 20%, email revenue is $400,000, the Retention Drivers Growth plan becomes 7.5% of it and the hire becomes 24% to 28%. Run the math with your own number from last quarter, not ours.
When You Should Hire None of the Three Yet
Your list makes no money now
If email brings in under about 5% of revenue with a real list, the cause is usually missing flows, a bad signup offer or deliverability. Our guide to email lists that are not making money walks through the checks before you pay anyone.
Your list is under 5,000 engaged profiles
Any paid option is a large share of what the list can earn. Build the core flows yourself and grow the list first.
Your emails land in spam
More sends make it worse. Fix sender authentication (the DNS records that prove your emails are really from you) and remove inactive profiles before adding volume.
You only sell on Amazon
Amazon does not share customer emails, so there is no list to work. Start with a Shopify store or another way to capture emails.
You cannot say what success looks like
Write down the number you will judge the work by (email revenue per month, or flow revenue) before you hire anyone.
Six Questions That Settle the Choice
How many engaged profiles do we have?
Count profiles that opened or clicked in the last 90 days. That number, not the total, sets the budget.
What did email bring in last quarter, and what share of revenue is that?
Use total store revenue as the base, and note whether the email figure is Klaviyo-attributed.
Do the core flows exist and work?
If not, buy a one-time build before any retainer or hire.
Who on staff can brief and check the work?
If nobody, a freelancer will drift. Pick an agency or hire.
Do we need SMS too?
SMS raises the tier at most agencies and adds a second skill set for a freelancer or hire.
Who will own the Klaviyo account and the templates?
You should, whichever option you choose.
About the Author
Ian Smith
Founder, Evolve Media Agency
Ian has run Evolve Media Agency since 2017 and has spent more than a decade in ecommerce, building and selling his own brands and producing listing content, video and ads for Amazon, Shopify and TikTok Shop brands. He writes every page on this site himself and the prices quoted for Evolve are the prices you pay.
Agency vs Freelancer vs In-House Questions
Should I hire an email marketing agency or a Klaviyo freelancer?
How much does a Klaviyo freelancer cost?
What does an in-house email marketer cost?
When does hiring email in-house make sense?
What do email agencies charge per month?
Can I run Klaviyo myself?
Is a hybrid of in-house and agency common?
What does Evolve Media Agency charge for email?
Bring Two Numbers to the Call
Book a free 30-minute call with your engaged profile count and last quarter's email revenue. We will tell you which of the three options fits, including when a freelancer or a hire is the better buy, and quote the scope in writing if we are the right fit.